diff --git a/src/mainboard/asus/p2b/Kconfig b/src/mainboard/asus/p2b/Kconfig
index 3895990eaa..0bee04f994 100644
--- a/src/mainboard/asus/p2b/Kconfig
+++ b/src/mainboard/asus/p2b/Kconfig
@@ -56,9 +56,9 @@ config VARIANT_DIR
 	default "p2b-f" if BOARD_ASUS_P2B_F
 	default "p2b-ls" if BOARD_ASUS_P2B_LS
 
-config DEVICETREE
+config OVERRIDE_DEVICETREE
 	string
-	default "variants/$(CONFIG_VARIANT_DIR)/devicetree.cb" if ! BOARD_ASUS_P2B
+	default "variants/$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
 config IRQ_SLOT_COUNT
 	int
diff --git a/src/mainboard/asus/p2b/devicetree.cb b/src/mainboard/asus/p2b/devicetree.cb
index 84f0c2962d..9dcd1da1db 100644
--- a/src/mainboard/asus/p2b/devicetree.cb
+++ b/src/mainboard/asus/p2b/devicetree.cb
@@ -37,10 +37,6 @@ chip northbridge/intel/i440bx		# Northbridge
           end
           device pnp 3f0.8 on		# GPIO 2
           end
-          device pnp 3f0.9 on		# GPIO 3
-          end
-          device pnp 3f0.a on		# ACPI
-          end
         end
       end
       device pci 4.1 on	end		# IDE
@@ -56,7 +52,6 @@ chip northbridge/intel/i440bx		# Northbridge
       register "ide1_drive1_udma33_enable" = "0"
       register "thrm_polarity" = "1"
       register "lid_polarity" = "1"
-      register "gpo" = "0x7fffbbff"
     end
   end
 end
diff --git a/src/mainboard/asus/p2b/variants/p2b-d/devicetree.cb b/src/mainboard/asus/p2b/variants/p2b-d/overridetree.cb
similarity index 50%
rename from src/mainboard/asus/p2b/variants/p2b-d/devicetree.cb
rename to src/mainboard/asus/p2b/variants/p2b-d/overridetree.cb
index fe82a0d74d..742414411b 100644
--- a/src/mainboard/asus/p2b/variants/p2b-d/devicetree.cb
+++ b/src/mainboard/asus/p2b/variants/p2b-d/overridetree.cb
@@ -8,47 +8,15 @@ chip northbridge/intel/i440bx		# Northbridge
     end
   end
   device domain 0 on		# PCI domain
-    device pci 0.0 on end		# Host bridge
-    device pci 1.0 on end		# PCI/AGP bridge
     chip southbridge/intel/i82371eb	# Southbridge
       device pci 4.0 on			# ISA bridge
         chip superio/winbond/w83977tf	# Super I/O
-          device pnp 3f0.0 on		# Floppy
-            io 0x60 = 0x3f0
-            irq 0x70 = 6
-            drq 0x74 = 2
-          end
-          device pnp 3f0.1 on		# Parallel port
-            io 0x60 = 0x378
-            irq 0x70 = 7
-          end
-          device pnp 3f0.2 on		# COM1
-            io 0x60 = 0x3f8
-            irq 0x70 = 4
-          end
-          device pnp 3f0.3 on		# COM2 / IR
-            io 0x60 = 0x2f8
-            irq 0x70 = 3
-          end
-          device pnp 3f0.5 on		# PS/2 keyboard / mouse
-            io 0x60 = 0x60
-            io 0x62 = 0x64
-            irq 0x70 = 1		# PS/2 keyboard interrupt
-            irq 0x72 = 12		# PS/2 mouse interrupt
-          end
-          device pnp 3f0.7 on		# GPIO 1
-          end
-          device pnp 3f0.8 on		# GPIO 2
-          end
           device pnp 3f0.9 on		# GPIO 3
           end
           device pnp 3f0.a on		# ACPI
           end
         end
       end
-      device pci 4.1 on	end		# IDE
-      device pci 4.2 on	end		# USB
-      device pci 4.3 on end		# ACPI
       register "ide0_enable" = "1"
       register "ide1_enable" = "1"
       register "ide_legacy_enable" = "1"
diff --git a/src/mainboard/asus/p2b/variants/p2b-ds/devicetree.cb b/src/mainboard/asus/p2b/variants/p2b-ds/overridetree.cb
similarity index 51%
rename from src/mainboard/asus/p2b/variants/p2b-ds/devicetree.cb
rename to src/mainboard/asus/p2b/variants/p2b-ds/overridetree.cb
index b8e9e8580f..6eabe5897b 100644
--- a/src/mainboard/asus/p2b/variants/p2b-ds/devicetree.cb
+++ b/src/mainboard/asus/p2b/variants/p2b-ds/overridetree.cb
@@ -8,47 +8,15 @@ chip northbridge/intel/i440bx		# Northbridge
     end
   end
   device domain 0 on		# PCI domain
-    device pci 0.0 on end		# Host bridge
-    device pci 1.0 on end		# PCI/AGP bridge
     chip southbridge/intel/i82371eb	# Southbridge
       device pci 4.0 on			# ISA bridge
         chip superio/winbond/w83977tf	# Super I/O
-          device pnp 3f0.0 on		# Floppy
-            io 0x60 = 0x3f0
-            irq 0x70 = 6
-            drq 0x74 = 2
-          end
-          device pnp 3f0.1 on		# Parallel port
-            io 0x60 = 0x378
-            irq 0x70 = 7
-          end
-          device pnp 3f0.2 on		# COM1
-            io 0x60 = 0x3f8
-            irq 0x70 = 4
-          end
-          device pnp 3f0.3 on		# COM2 / IR
-            io 0x60 = 0x2f8
-            irq 0x70 = 3
-          end
-          device pnp 3f0.5 on		# PS/2 keyboard / mouse
-            io 0x60 = 0x60
-            io 0x62 = 0x64
-            irq 0x70 = 1		# PS/2 keyboard interrupt
-            irq 0x72 = 12		# PS/2 mouse interrupt
-          end
-          device pnp 3f0.7 on		# GPIO 1
-          end
-          device pnp 3f0.8 on		# GPIO 2
-          end
           device pnp 3f0.9 on		# GPIO 3
           end
           device pnp 3f0.a on		# ACPI
           end
         end
       end
-      device pci 4.1 on	end		# IDE
-      device pci 4.2 on	end		# USB
-      device pci 4.3 on end		# ACPI
       device pci 6.0 on end		# Onboard SCSI
       register "ide0_enable" = "1"
       register "ide1_enable" = "1"
diff --git a/src/mainboard/asus/p2b/variants/p2b-f/devicetree.cb b/src/mainboard/asus/p2b/variants/p2b-f/devicetree.cb
deleted file mode 100644
index 5bee5ae96a..0000000000
--- a/src/mainboard/asus/p2b/variants/p2b-f/devicetree.cb
+++ /dev/null
@@ -1,59 +0,0 @@
-chip northbridge/intel/i440bx		# Northbridge
-  device cpu_cluster 0 on		# APIC cluster
-    chip cpu/intel/slot_1		# CPU
-      device lapic 0 on end		# APIC
-    end
-  end
-  device domain 0 on		# PCI domain
-    device pci 0.0 on end		# Host bridge
-    device pci 1.0 on end		# PCI/AGP bridge
-    chip southbridge/intel/i82371eb	# Southbridge
-      device pci 4.0 on			# ISA bridge
-        chip superio/winbond/w83977tf	# Super I/O (FIXME: It's W83977EF!)
-          device pnp 3f0.0 on		# Floppy
-            io 0x60 = 0x3f0
-            irq 0x70 = 6
-            drq 0x74 = 2
-          end
-          device pnp 3f0.1 on		# Parallel port
-            io 0x60 = 0x378
-            irq 0x70 = 7
-          end
-          device pnp 3f0.2 on		# COM1
-            io 0x60 = 0x3f8
-            irq 0x70 = 4
-          end
-          device pnp 3f0.3 on		# COM2 / IR
-            io 0x60 = 0x2f8
-            irq 0x70 = 3
-          end
-          device pnp 3f0.5 on		# PS/2 keyboard
-            io 0x60 = 0x60
-            io 0x62 = 0x64
-            irq 0x70 = 1		# PS/2 keyboard interrupt
-            irq 0x72 = 12		# PS/2 mouse interrupt
-          end
-          device pnp 3f0.6 on		# Consumer IR
-          end
-          device pnp 3f0.7 on		# GPIO 1
-          end
-          device pnp 3f0.8 on		# GPIO 2
-          end
-          device pnp 3f0.a on		# ACPI
-          end
-        end
-      end
-      device pci 4.1 on	end		# IDE
-      device pci 4.2 on	end		# USB
-      device pci 4.3 on end		# ACPI
-      register "ide0_enable" = "1"
-      register "ide1_enable" = "1"
-      register "ide_legacy_enable" = "1"
-      # Enable UDMA/33 for higher speed if your IDE device(s) support it.
-      register "ide0_drive0_udma33_enable" = "0"
-      register "ide0_drive1_udma33_enable" = "0"
-      register "ide1_drive0_udma33_enable" = "0"
-      register "ide1_drive1_udma33_enable" = "0"
-    end
-  end
-end
diff --git a/src/mainboard/asus/p2b/variants/p2b-f/overridetree.cb b/src/mainboard/asus/p2b/variants/p2b-f/overridetree.cb
new file mode 100644
index 0000000000..f0fc054568
--- /dev/null
+++ b/src/mainboard/asus/p2b/variants/p2b-f/overridetree.cb
@@ -0,0 +1,14 @@
+chip northbridge/intel/i440bx		# Northbridge
+  device domain 0 on		# PCI domain
+    chip southbridge/intel/i82371eb	# Southbridge
+      device pci 4.0 on			# ISA bridge
+        chip superio/winbond/w83977tf	# Super I/O (FIXME: It's W83977EF!)
+          device pnp 3f0.6 on		# Consumer IR
+          end
+          device pnp 3f0.a on		# ACPI
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/src/mainboard/asus/p2b/variants/p2b-ls/devicetree.cb b/src/mainboard/asus/p2b/variants/p2b-ls/devicetree.cb
deleted file mode 100644
index a9901b4198..0000000000
--- a/src/mainboard/asus/p2b/variants/p2b-ls/devicetree.cb
+++ /dev/null
@@ -1,58 +0,0 @@
-chip northbridge/intel/i440bx		# Northbridge
-  device cpu_cluster 0 on		# APIC cluster
-    chip cpu/intel/slot_1		# CPU
-      device lapic 0 on end		# APIC
-    end
-  end
-  device domain 0 on		# PCI domain
-    device pci 0.0 on end		# Host bridge
-    device pci 1.0 on end		# PCI/AGP bridge
-    chip southbridge/intel/i82371eb	# Southbridge
-      device pci 4.0 on			# ISA bridge
-        chip superio/winbond/w83977tf	# Super I/O (FIXME: It's W83977EF!)
-          device pnp 3f0.0 on		# Floppy
-            io 0x60 = 0x3f0
-            irq 0x70 = 6
-            drq 0x74 = 2
-          end
-          device pnp 3f0.1 on		# Parallel port
-            io 0x60 = 0x378
-            irq 0x70 = 7
-          end
-          device pnp 3f0.2 on		# COM1
-            io 0x60 = 0x3f8
-            irq 0x70 = 4
-          end
-          device pnp 3f0.3 on		# COM2 / IR
-            io 0x60 = 0x2f8
-            irq 0x70 = 3
-          end
-          device pnp 3f0.5 on		# PS/2 keyboard
-            io 0x60 = 0x60
-            io 0x62 = 0x64
-            irq 0x70 = 1		# PS/2 keyboard interrupt
-            irq 0x72 = 12		# PS/2 mouse interrupt
-          end
-          device pnp 3f0.7 on		# GPIO 1
-          end
-          device pnp 3f0.8 on		# GPIO 2
-          end
-          device pnp 3f0.a off		# ACPI
-          end
-        end
-      end
-      device pci 4.1 on	end		# IDE
-      device pci 4.2 on	end		# USB
-      device pci 4.3 on end		# ACPI
-      device pci 6.0 on end             # Onboard SCSI
-      register "ide0_enable" = "1"
-      register "ide1_enable" = "1"
-      register "ide_legacy_enable" = "1"
-      # Enable UDMA/33 for higher speed if your IDE device(s) support it.
-      register "ide0_drive0_udma33_enable" = "0"
-      register "ide0_drive1_udma33_enable" = "0"
-      register "ide1_drive0_udma33_enable" = "0"
-      register "ide1_drive1_udma33_enable" = "0"
-    end
-  end
-end
diff --git a/src/mainboard/asus/p2b/variants/p2b-ls/overridetree.cb b/src/mainboard/asus/p2b/variants/p2b-ls/overridetree.cb
new file mode 100644
index 0000000000..bb252c0b0b
--- /dev/null
+++ b/src/mainboard/asus/p2b/variants/p2b-ls/overridetree.cb
@@ -0,0 +1,12 @@
+chip northbridge/intel/i440bx		# Northbridge
+  device domain 0 on			# PCI domain
+    chip southbridge/intel/i82371eb	# Southbridge
+      device pci 4.0 on			# ISA bridge
+        chip superio/winbond/w83977tf	# Super I/O
+          device pnp 3f0.a off		# ACPI
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/src/mainboard/asus/p2b/variants/p2b/overridetree.cb b/src/mainboard/asus/p2b/variants/p2b/overridetree.cb
new file mode 100644
index 0000000000..6d471357e4
--- /dev/null
+++ b/src/mainboard/asus/p2b/variants/p2b/overridetree.cb
@@ -0,0 +1,15 @@
+chip northbridge/intel/i440bx		# Northbridge
+  device domain 0 on		# PCI domain
+    chip southbridge/intel/i82371eb	# Southbridge
+      register "gpo" = "0x7fffbbff"
+      device pci 4.0 on			# ISA bridge
+        chip superio/winbond/w83977tf	# Super I/O
+          device pnp 3f0.9 on		# GPIO 3
+          end
+          device pnp 3f0.a on		# ACPI
+          end
+        end
+      end
+    end
+  end
+end